Designers of modern control interfaces continue to face pressure to reduce panel depth while maintaining precise operator input and consistent tactile response. The Bourns® Model PER40 22 mm Low-Profile Incremental Ring Encoder addresses these requirements with a compact ring-style mechanical design, 2-phase quadrature code output, and continuous 360 ° electrical travel. The PER40 encoder provides 15 pulses per 360 ° rotation, 30 detents, and operation from 3.3 VDC to 5 VDC while supporting an operating temperature range of -40 °C to +85 °C.

As industrial equipment, instrumentation systems, and digital control interfaces become more compact, designers must balance panel space limitations with operator usability. Many applications require precise incremental position sensing together with positive tactile feedback that allows operators to make adjustments confidently. The PER40 encoder addresses these requirements through its low-profile mechanical package, quadrature output compatible with digital control electronics, and haptic detent feedback. Its continuous rotation capability and 30,000-cycle rotational life support applications requiring frequent operator interaction while maintaining consistent performance.

“Designers of industrial and interface equipment often need an input device that provides reliable incremental position sensing without increasing system height. The Model PER40 combines a low-profile mechanical design with 15-pulse quadrature output, continuous rotation, and tactile detent feedback, allowing engineers to maintain intuitive user control while supporting compact equipment designs.”

Design Features and Key Capabilities

• Low-profile mechanical design - 22 mm ring-style encoder configuration supports compact equipment and reduced panel height.
• 2-phase quadrature output - Provides incremental position sensing for digital controllers and embedded systems.
• Haptic detent feedback - Thirty detents per revolution deliver positive tactile indication during operation.
• Continuous electrical travel - Supports uninterrupted 360 ° rotational control.
• Industrial operating temperature range - Rated from -40 °C to +85 °C.
• Rotational life - Rated for 30,000 cycles.
• RoHS compliant* - Supports applicable environmental compliance requirements.

Electrical Specifications

Target Applications

• Industrial automation
• Industrial tools
• Test and measurement
• Instrumentation in home appliances